Wireless apparatus.



FREDERICK o. sancnnr, or .wns'rroma, massacnusnrrs,

Wra-Ennss Armam'us.

To all whom it may concern:

Be it known that I, FREDERICK GLSAR- GENT, a citizen of the United States, residing at Westford, in thecounty of Middlesex and State of Massachusetts, have invented a new and useful Wireless Apparatus, of'

which the following isa specification.

This invention relates to" a system for the wireless transmission of energy, particularly adapted for telephony and telegraphy.

The principal objects of the invention are to provide means whereby both transmission I and reception of the Hertzian. waves will be improved and facilitated; to provide means whereby the waves will be transmitted in substantially true spherical waves so that there will be no interference between the waves produced by the same transmitting terminal or propagator; and to provide an improved detector which can be-operated without anyicohering material and will be two sections constructed in accordance with capable of delicate tuning and adjustment.

Further objects and. advantages of the invention will appear hereinafter.

Reference is to be hadto the accompanying drawings, in'which igure lis a diagrammatic view showing the principles of this invention; Fig. 2 is adiagrammatic View ofone of the stations on an enlarged scale; and Fig. 3 is a view of a modification of the receiving antennae.-

-' preferably having a spherical termi It has been the custom generally. to provide each station with an aerial which; is used both for receivin and sending. I find that in this Way the ull efiiciency of either receiving or sending is not obtained and for the purpose of securing a higher degree-of efiiciency the sendingstation A is provided with a sending or transmitting aerial 10 l 11, and with areceiving aerial 12 having/a receiving terminal 13 preferably in the form of antennae consisting ofa 'plurality of bare wires. The propagator ll'is preferably 10- cated-ata higher altitude than the antennae 13. The two, aerials preferably, are pro-' .vided with insulation on their surfaces and ingstation B is equipped substantiall in the same'way, but in order to get a 'gh degree of efiicienc y the weight andv resistance of the propagating aerial 10 at. station B Specification of Letters Patent. Application filed April'3, 1909. Serial No. 487, 09.

, b ock 28.

same as those of the receiving aerial 12 at station" A, and vice versa. This gives the 1- same capacity to the receiving parts at one Patented Nov. '1, 1910.

including its terminal are substantially the station and the transmitting parts at the other.

In order that the waves transmitted from the sending aerialmaybe sent out in :true spherical-waves so thatthey will not inter.

fere witheach other, {the terminals l'lare preferably made spherical, but the receiving terminals are shown in the form of spreading antennae for more efiiciently, receiving 1 the vibrations, and transmitting them to the detector. these aerials is connected up, The trans Fig. 2 shows how each one foff mitting aerial is connected-with a transmits ter 14 which is connected with a conductor 15; which is grounded and connected at its,

opposite end with a terminal 16 on the detector 17. The opposite terminal 18.01? the detector is connected directly with theaerial 12, Both terminals 16 and 18 are connected with acircuit 19. in which is a battery: or the.

like '20, an instrument 21 for receivin flor sending, and a ing the voltage.

potentiometer 22 for regulat- Between the two terminals 16'and18 the V detector is located. The terminal 18'is :connected with a binding post or the like 23 to which 'is secured one end of a bare conducting wire 24L of any desired shape.- Iheother 1 end of this wire is connected with a 'screw25 which is adapted to be-turned to regulate v the tension of the wire. This wire therefore is freely suspended so that-itwill becapable of vibration, but it can be tuned by turning;

s ring 27 which is in turn mountedon a in an obvious-manner. The spring is con: nected through a resistance 30 to the'term1 nal- 16. This resistance so as'to be capable of yie ding'to perinit the block 28 tomo've back and forth in 8i,di1C--.

tion parallel withfthedirection of the'wire The vibration of this spring is regulated by a screw 29 carried by said block preferably :is made 24. For this purpose the block is mounted to slide in ways 31. -It will be understood and provide for 'securingthe maximum e cien'cy under'all conditions, and that the block on which this point is supported may that the purpose of adjusting the contact point 26 is to secure an additional tumn be stationary if desired a's' ordinarily sufiicient tunin may be secured by the screw 25 alone. It is preferred, however, to e1nploy both the screw 29 andthe longitudinal adjustment of the contact point 26 in combinationwith'the screw 25.]

'For the purpose of restricting the vibration of the wire 24 a dam-per 32 may be used consisting ofa spring regulated by a screw 33. This is placed so as not to-interfere with p the adjustment of the contact point 26.

I have found in practice that there is a slight tendency of the contact point26 to'co-v here permanently to the wire. In order to prevent this a very light spring 34 of non-- conducting material even paper being used with success) is place on the'spring -2Z .so as to project beyond the contact- 26 and strike thewire before the contact point.

In Fig. 3 is shown amodification-of the antennae of the receiving aerial -shown in the form of a. series of parallel wires 35 supported by masts 36 and connected with the aerial.

While I have illustrated and described a preferred embodiment of the invention I am aware that many modifications can be made therein by any-person skilled in the art without departing from the scope of the invention as expressed in the claims, Therefore I do not wish to be limited to all the details of construction shown and described, but

WhatI-doclaim is In a e iceof the character described,

the combination of a metallic conductor supported at its-ends and freeto vibrate,

' and a. vibratory carbon contact point adapted* to engage said conductor, said contact" point and conductor being adapted to vibrate under the influence of Hertzian waves. 2, A detector for .the purpose described,

. comprising a conductor'supported at two the conductoiysaid contact points and free to vibrate between said points, a conducting point adapted to engage said conductor and free to vibrate, and

'1 transversely thereto. f

4. A' detectorfor the purpose described comprising 'aj'conductor supported at two.

"points" and free to vibrate between said points, and a vibratory contactpoint lightly engaging it between said two poi1its, said conductor and contact point being'connected with a' ,circuit.-

5. A detector comprising a conductor, a

yieldingly supported vibratory, contact point adapted to engage the side thereof, and a light non conducting spring supported to vibrate with said contact point, and projecting beyond said point, whereby'said light spring will engage the conductor before the point to prevent permanent coherence.

' =6. A detector for wireless apparatus comprising a wire supported at its ends and adapted to vibrate under the influence of .Hertzian waves, and a vibratory contact point adapted to engage said conductor be- .tween its ends, the conductor and contact point each having a terminal constituting the terminals of a circuit, and means for preventing permanent coherence between the conductor and contact point.

7. A detector for the purpose described comprising a conductor supported at two points and free to vibrate between said points, a contact point lightly engaging it, and a damping device engaging the conductor to restrict the vibration.

A detector for the purpose described, comprising a conductorsecured at'its ends and free to vibrate, a conducting point adapted to engage said conductor and free to. vibrate, means for adjusting said point to and from the conductor, said contact point being movable along the conductor, and a damping spring adapted to engage the conductor to restrict its vibrations.

9. A detector for wireless apparatus comprising a wire supported at its ends and adapted to vibrate under the influence of Hertzianwaves, a contact point adapted to engage'said conductor, the conductor and contact point each having a terminal constituting the terminals of a circuit and an adjustable damping spring adapted to engage said conductor to I restrict the vibrations thereof.

-10. A detector comprising a conductor f and a ieldingly supported vibratory contact poiiit adapted to engage the sidethereof, and a yielding non-conducting member.

' FREDERICK G. SARGENT.

Witnesses: I

Osnonn H. CILLEY, WILLIAM F. Suzanna. 

